NEEDS: Quarterback moved to the top of the list after Buffalo traded three-year starter Tyrod Taylor to the Cleveland Browns in exchange for a third-round pick. The deal leaves Nathan Peterman — a fifth-round draft pick last year — as the only quarterback on the roster. Aside from free agency, the Bills are anticipated to select a quarterback in the draft. The defensive front seven could be in store for major overhaul with Williams yet to determine whether he’ll retire, starters Brown and Humber eligible for free agency. Unanticipated hole to fill is centre after Eric Woods was diagnosed with career-ending neck injury in January. Bills already addressed needs by signing nine-year veteran CB Vontae Davis and running back Chris Ivory, who is expected to take over as LeSean McCoy’s primary backup.